Obtaining of Coumarone-Indene Resins based on Light Fraction of Coal Tar. 5. Emulsions on the Basis of Bitumen Modified by Coumarone-Indene Resins with Epoxy Groups

Hydroxyapatite nanoparticles were isolated from a biowaste, buffalo bone, via the thermal decomposition method. The resulting white powdered material was characterized by Fourier Transformed Infrared (FTIR) spectroscopy, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX) analysis. The FTIR spectra confirmed that a heat treatment of the bone powder at the temperature at or above 1223 K removed the organic moieties leading to the formation of a pure inorganic biomineral. The XRD analyses showed that the obtained material was nanocrystalline HAp (nano-HAp) with an average grain diameter of 25 nm, while their rod-shaped particles with their tightly agglomerated morphology were confirmed by the SEM analysis. Besides Calcium (Ca), Phosphorous (P), and Oxygen (O), trace amounts of Aluminum (Al), Magnesium (Mg), Copper (Cu), Zirconium (Zr) and Carbon (C) were also found by EDX analysis. Antibacterial activity of nano-HAp against six standard isolates was investigated by the agar well diffusion method and found to be more susceptible to Acinetobacter baumannii while other standard strains such as Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus showed lesser susceptibility and no antibacterial activity was noticed against Salmonella typhi and Methicillin resistant Staphylococcus aureus (MRSA) with the analysed concentration of nano-HAp suggesting its potential application in biomedical fields.

Section: Introductionmentioning

confidence: 99%

Isolation of Antibacterial Nano-Hydroxyapatite Biomaterial from Waste Buffalo Bone and Its Characterization

Parajuli¹,

Malla²,

Panchen³

et al. 2022

“…4 These byproducts, in particular the light fraction, containing indene, coumarone, styrene and other hydrocarbons. This made it possible to create on its basis the indenecoumarone resins with carboxy, 4 epoxy, 20,21 and methacrylate 22 groups. The synthesized indene-coumarone resins with functional groups are used as active additives to improve the properties of petroleum bitumen.…”

Section: Introductionmentioning

confidence: 99%

“…The synthesized indene-coumarone resins with functional groups are used as active additives to improve the properties of petroleum bitumen. 21 Today, apart from the by-products formed in the industrial processing of carbon-containing materials, the accumulation of rubber waste is an important problem. The main type of rubber waste is used tires, which accumulate in the world during the year up to 10 million tons.…”

Section: Introductionmentioning

confidence: 99%

Effects of Hydrophilic Silica Nanoparticles on Morphology and Mechanical Properties of a Typical Tyre Compound

Dortaj¹,

Mohebbi²,

Bagheri³

et al. 2022

This research aimed to study the effects of adding hydrophilic silica nanoparticles as nanofiller on tread properties of a typical tyre compound. In this respect, four compounds were prepared as a representative of the tread of the tyre. The amount of 0, 1, 3, and 5 phr (parts of filler per hundred parts of rubber) of nanofiller were added by melt mixing method. Physical and mechanical properties of compounds were measured. The structure and morphology of the fractured surface of the compounds were characterized using field emission scanning electron microscopy (Fe-SEM). The results of cure and mechanical analysis of the compound series showed that the sample containing 3 phr of nanofiller possesses better properties. This observation is due to higher interaction between nanofiller and polymer macromolecules that causes better dispersion of the nanoparticles in polymer matrix.

“…Last decades the scientific researchers of the Department of Chemical Technology of Oil and Gas Processing at Lviv Polytechnic National University have been conducting studies on possibility of using petroleum [12][13][14], phenol-formaldehyde [15], epoxy [16], coumarone-indene [17] and phenol-cresol-formaldehyde [18][19][20][21][22] resins as polymeric additives.…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb(II) from Aqueous Solution by Ceramsite Prepared from Isfahan Bentonite and γ-Alumina

Mobasherpour¹,

Javaherai²,

Salahi³

et al. 2021

Removal of lead from aqueous solutions was studied using nanocomposite absorbent of bentonite/-alumina. The novel absorbent was characterized using XRD, FT-IR and SEM-EDX. Absorption process optimization using response surface methodology (RSM) and experimental design was performed with central composite design technique. The effects of Pb(II) initial concentration, adsorbent dosage, and composite percentage on Pb(II) removal percentage and adsorption capacity were examined. The adsorption capacity of 166.559 mg/g and removal % of 82.9887 with desirability equal to 0.763 were obtained for optimal initial concentration of 200 mg•l-1, adsorbent dosage of 0.5 mg•l-1, and composite percentage of 7.08 % determined using RSM design. The equilibrium adsorption data were investigated by Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. It was found that Freundlich isotherm model fits better compared with other models.